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[AMPS] Tuning of amps - 3cx800s,etc..

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Subject: [AMPS] Tuning of amps - 3cx800s,etc..
From: (Rich Measures)
Date: Mon, 16 Mar 98 02:26:19 -0800
>On Sun, 15 Mar 98 16:06:04 -0800 Rich Measures <> writes:
>>>On Sun, 15 Mar 98 12:35:50 -0800 Rich Measures <> 
>>>>- Eimac publishes no maximum grid-current rating for high Mu 
>>>>nor recommends  specific grid currents. 
>>>The 3CX800A7 Eimac sheet recommends as "typical" 36ma  CW  and 16ma 
>>>tone grid currents at an Ep of 2200VDC. 
>>>Similar recommendations exist for numerous triodes; 3-500Z, 3-1000Z, 
>>"Typical" means neither "maximum" nor "recommended", except possibly 
>>within the Conyers city limits.  
>Maybe not out in the land of fruits and nuts Rich. I consider typical and
>recommended to be synonomous.
I see.  
>>>Maximum currents are not specified in the sheets but I have a copy of an
>>>Eimac letter to Amp Supply stating that 50ma is the absolute limit for
>>>the 3CX800A7. 
>>50mA is not even close to the rated 5w max.  grid dissipation, Carl.  
>Except  the max according to the great god Eimac is 4W. 

50mA is roughly 2w.

>Anyway I suspect
>they may have had a reason considering the ability of some hams when it
>comes to tuning. Something about a little caution saves dollars in
>>How about e-mailing me the JPEG image of this Eimac letter?   
>Via can do. 
How about a xerox copy and snail mail?  Would one greenback and a SASE 
cover it? 


R. L. Measures, 805-386-3734, AG6K   

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